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What is the next number? (Posted on 2005-02-20) |
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What is the next number in the following series:
17 15 14 13 13 14 17 23 ?
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Submitted by Swastika Shrivastava
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Rating: 1.2500 (4 votes)
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Solution:
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(Hide)
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The answer is :34.
The difference between the consecutive numbers is:
-2 -1 -1 0 1 3 6.
Adding +2 to each of the numbers gives
0 1 1 2 3 5 8
which is the fibonacci series!
Next number in the fibonacci series is 13.Subtracting 2 from 13 gives 11.Adding 11 to the last number 23 of the original series gives 34!!
Hence the answer is 34. |
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